The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2003
Filed:
Apr. 19, 2001
Markus Henneken, Kressbronn, DE;
Friedemann Jauch, Meckenbeuren, DE;
Kai-Uwe Herbster, Friedrichshafen, DE;
Franz-Josef Schuler, Kressbronn, DE;
Thomas Mauz, Kressbronn, DE;
ZF Friedrichshafen AG, Friedrichshafen, DE;
Abstract
A method for controlling an electronically controlled automatic transmission wherein the spontaneous gas/pedal release (FastOff) is detected and an upshift prevention system is activated when a pedal position gradient (PSTG) is lower than a pedal position gradient threshold (KF_PSTG); the state of the upshift prevention system (FFO=1) is active until a) a traction operation is detected when the actual pedal position value (PST) exceeds a traction-thrust characteristic line (KF_ZS) and of an acceleration potential value (FBN) equivalent to a road gradient value; and/or b) a time (T , T ) has elapsed after a defined time period (THSV , THSV ) wherein the state of the upshift prevention system (FFO=1) is abandoned.